Fix language bump script to handle order swapping
Fix language bump script to handle order swapping

The dev/add-line script that adds a new minor version and removes the
deprecated older version does so by replacing the old version (1.16)
with the new version (1.17). However, this left 1.17 as the "latest"
version, which was not correct.

bosh-packages/golang-release,bosh-packages/golang-release